Ti nker AFB, OK TAFB Techni cal Spr ci f i cat i ons 2019

SECTI ON 07 19 00

WATER REPELLENTS

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

AMERI CAN ARCHI TECTURAL MANUFACTURERS ASSOCI ATI ON ( AAMA)

AAMA 501. 1 ( 2005) St andar d Test Met hod f or Wat er Penet r at i on of Wi ndows, Cur t ai n Wal l s and Door s Usi ng Dynami c Pr essur e

AMERI CAN ASSOCI ATI ON OF STATE HI GHWAY AND TRANSPORTATI ON OFFI CI ALS

(AASHTO)

AASHTO T 259 ( 2002; R 2017) St andar d Met hod of Test f or Resi st ance of Concr et e t o Chl or i de I on Penetration

AASHTO T 260 ( 1997; R 2016) St andar d Met hod of Test f or Sampl i ng and Test i ng f or Chl or i de I on i n Concr et e and Concr et e Raw Mat er i al s

ASTM I NTERNATI ONAL ( ASTM)

ASTM C140/ C140M ( 2017) St andar d Test Met hods f or Sampl i ng and Test i ng Concr et e Masonr y Uni t s and Rel at ed Uni t s

ASTM C642 ( 2013) Densi t y, Absor pt i on, and Voi ds i n Har dened Concr et e

ASTM C672/ C672M ( 2012) Scal i ng Resi st ance of Concr et e Sur f aces Exposed t o Dei c i ng Chemi cal s

ASTM D1653 ( 2013) Wat er Vapor Tr ansmi ssi on of Or gani c Coat i ng Fi l ms

ASTM D2369 ( 2010; R 2015; E 2015) Vol at i l e Cont ent of Coatings

ASTM D3278 ( 1996; R 2011) Fl ash Poi nt of Li qui ds by Smal l Scal e Cl osed- Cup Appar at us

ASTM E514/ E514M ( 2014a) St andar d Test Met hod f or Wat er Penet r at i on and Leakage Thr ough Masonr y

ASTM E96/ E96M ( 2016) St andar d Test Met hods f or Wat er Vapor Tr ansmi ssi on of Mat er i al s

ASTM G154 ( 2016) St andar d Pr act i ce f or Oper at i ng

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Fl uor escent Li ght Appar at us f or UV Exposur e of Nonmet al l i c Mat er i al s

U. S. NATI ONAL ARCHI VES AND RECORDS ADMI NI STRATI ON ( NARA)

29 CFR 1910. 1000 Ai r Cont ami nant s

1. 2 SUBMITTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL PROCEDURES:

SD- 03 Pr oduct Dat a

Wat er Repel l ent s

SD- 06 Test Repor t s

Wat er Absor pt i on

Accel er at ed Weat her i ng

Resi st ance t o Chl or i de I on Penet r at i on

Moi st ur e Vapor Tr ansmi ssi on

Scal i ng Resi st ance

Wat er Penet r at i on and Leakage

SD- 07 Cer t i f i cat es

Manuf act ur er ' s Qual i f i cat i ons

Appl i cat or ' s Qual i f i cat i ons

Evi dence of Accept abl e Var i at i on

Warranty

SD- 08 Manuf act ur er ' s I nst r uct i ons

Appl i cat i on I nst r uct i ons

Pr ovi de manuf act ur er ' s i nst r uct i ons i ncl udi ng pr epar at i on, appl i cat i on, r ecommended equi pment t o be used, saf et y measur es, and pr ot ect i on of compl et ed appl i cat i on.

Manuf act ur er ' s Saf et y Dat a Sheet s

1. 3 QUALI TY ASSURANCE

1. 3. 1 Qualifications

a. Manuf act ur er ' s qual i f i cat i ons: Mi ni mum f i ve year s r ecor d of successf ul i n- ser vi ce exper i ence of wat er r epel l ent t r eat ment s manuf act ur ed f or concr et e masonr y, appl i cat i on.

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b. Appl i cat or ' s qual i f i cat i ons: Mi ni mum f i ve year s successf ul exper i ence i n pr oj ect s of s i mi l ar scope usi ng speci f i ed or s i mi l ar t r eat ment mat er i al s and manuf act ur er ' s appr oval f or appl i cat i on.

1. 3. 2 Per f or mance Requi r ement s

a. Wat er absor pt i on: ASTM C140/ C140M. Compar i son of t r eat ed and unt r eat ed speci mens.

b. Moi st ur e vapor t r ansmi ssi on: ASTM E96/ E96M. Compar i son of t r eat ed and unt r eat ed speci mens.

c. Wat er penet r at i on and l eakage t hr ough masonr y: ASTM E514/ E514M.

1. 3. 3 Evi dence of Accept abl e Var i at i on

I f a pr oduct pr oposed f or use does not conf or m t o r equi r ement s of t he r ef er enced speci f i cat i on, submi t f or appr oval t o t he Cont r act i ng Of f i cer , evi dence t hat t he pr oposed pr oduct i s ei t her equal t o or bet t er t han t he pr oduct speci f i ed. I ncl ude t he f ol l owi ng:

a. I dent i f i cat i on of t he pr oposed subst i t ut i on;

b. Reason why t he subst i t ut i on i s necessar y;

c. A compar at i ve anal ysi s of t he speci f i ed pr oduct and t he pr oposed subst i t ut i on, i ncl udi ng t abul at i ons of t he composi t i on of pi gment and vehicle ;

d. The di f f er ence bet ween t he speci f i ed pr oduct and t he pr oposed subst i t ut i on; and

e. Ot her i nf or mat i on necessar y f or an accur at e compar i son of t he pr oposed subst i t ut i on and t he speci f i ed pr oduct .

1. 4 SAMPLE TEST PANEL

The appr oved Sampl e Test Panel wi l l ser ve as t he st andar d of qual i t y f or al l ot her wat er r epel l ent coat i ng wor k. Do not pr oceed wi t h appl i cat i on unt i l t he sampl e panel has been appr oved by t he Cont r act i ng Of f i cer .

1. 4. 1 Pr e- I nst al l at i on Meet i ng

a. At t end pr e- i nst al l at i on meet i ng r equi r ed pr i or t o commencement of concr et e masonr y, i nst al l at i on.

b. Revi ew pr ocedur es and coor di nat i on r equi r ed bet ween wat er r epel l ent t r eat ment wor k and wor k of ot her t r ades whi ch coul d af f ect wor k t o be per f or med under t hi s sect i on of t he wor k.

c. Convene addi t i onal pr e- i nst al l at i on meet i ng pr i or t o wat er r epel l ent t r eat ment appl i cat i on f or coor di nat i on wi t h wor k not pr evi ousl y coor di nat ed i ncl udi ng j oi nt seal ant s.

1. 5 REGULATORY REQUI REMENTS

1. 5. 1 Envi r onment al Pr ot ect i on

I n addi t i on t o r equi r ement s speci f i ed i n Sect i on 01 57 19 TEMPORARY

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ENVI RONMENTAL CONTROLS f or envi r onment al pr ot ect i on, pr ovi de coat i ng mat er i al s t hat conf or m t o t he r est r i ct i ons of t he Local Ai r Pol l ut i on Cont r ol j ur i sdi ct i on . Not i f y t he Cont r act i ng Of f i cer of any wat er r epel l ent coat i ng speci f i ed her ei n whi ch f ai l s t o conf or m t o t he l ocal Ai r Qual i t y Management Di st r i ct Rul es at t he l ocat i on of t he Pr oj ect . I n l ocal i t i es wher e t he speci f i ed coat i ng i s pr ohi bi t ed, t he Cont r act i ng Of f i cer may di r ect t he subst i t ut i on of an accept abl e coat i ng.

1. 6 DELI VERY, STORAGE, AND HANDLI NG

Del i ver mat er i al s i n or i gi nal seal ed cont ai ner s, c l ear l y mar ked wi t h t he manuf act ur er ' s name, br and name, t ype of mat er i al , bat ch number , per cent sol i ds by wei ght and vol ume, and dat e of manuf act ur er . St or e mat er i al s of f t he gr ound, i n a dr y ar ea wher e t he t emper at ur e wi l l be not l ess 50 degr ees F nor mor e t han 85 degr ees F.

1. 7 SAFETY METHODS

Appl y coat i ng mat er i al s usi ng saf et y met hods and equi pment i n accor dance wi t h Sect i on 01 57 19 TEMPORARY ENVI RONMENTAL CONTROLS, and t he f ol l owi ng:

1. 7. 1 Toxi c Mat er i al s

To pr ot ect per sonnel f r om over exposur e t o t oxi c mat er i al s, conf or m t o t he most st r i ngent gui dance of :

a. The coat i ng manuf act ur er when usi ng sol vent s or ot her chemi cal s. Use i mper meabl e gl oves, chemi cal goggl es or f ace shi el d, and ot her r ecommended pr ot ect i ve c l ot hi ng and equi pment t o avoi d exposur e of ski n, eyes, and r espi r at or y syst em. Conduct wor k i n a manner t o mi ni mi ze exposur e of bui l di ng occupant s and t he gener al publ i c.

b. 29 CFR 1910. 1000.

c. Thr eshol d Li mi t Val ues ( R) of t he Amer i can Conf er ence of Gover nment al I ndust r i al Hygi eni st s.

d. Manuf act ur er ' s Saf et y Dat a Sheet s.

1. 8 ENVI RONMENTAL CONDI TI ONS

1. 8. 1 Weat her and Subst r at e Condi t i ons

Do not pr oceed wi t h appl i cat i on of wat er r epel l ent s under any of t he f ol l owi ng condi t i ons, except wi t h wr i t t en r ecommendat i ons of manuf act ur er .

a. Ambi ent t emper at ur e i s l ess t han 40 degr ees F.

b. Subst r at e f aces have cur ed l ess t han one mont h.

c. Rai n or t emper at ur e bel ow 40 degr ees F ar e pr edi ct ed f or a per i od of 24 hour s bef or e or af t er t r eat ment .

d. Ear l i er t han t hr ee days af t er sur f aces ar e wet .

e. Subst r at e i s f r ozen or sur f ace t emper at ur e i s l ess t han 40 degr ees F and f al l i ng.

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1. 8. 2 Moi st ur e Condi t i on

Det er mi ne moi st ur e cont ent of subst r at e meet s manuf act ur er ' s r equi r ement s pr i or t o appl i cat i on of wat er r epel l ent mat er i al .

1. 9 SEQUENCI NG AND SCHEDULI NG

1. 9. 1 Masonr y Sur f aces

Do not st ar t wat er r epel l ent coat i ng unt i l al l j oi nt t ool i ng, poi nt i ng and masonr y c l eani ng oper at i ons have been compl et ed. Al l ow masonr y t o cur e f or at l east 60 days under nor mal weat her condi t i ons bef or e appl y i ng wat er repellent.

1. 9. 2 Pl ast er Sur f aces

Do not st ar t wat er r epel l ent coat i ng unt i l al l shr i nkage and st r ess cr acks ar e r epai r ed and sound, al l sur f aces ar e f r ee of def ect s and cl eani ng oper at i ons have been compl et ed. Al l ow pl ast er t o cur e f or at l east 30 days under nor mal weat her condi t i ons bef or e appl y i ng wat er r epel l ent .

1. 9. 3 Concr et e Sur f aces

Do not st ar t wat er r epel l ent coat i ng unt i l al l pat chi ng, poi nt i ng and cl eani ng oper at i ons have been compl et ed and concr et e has cur ed a mi ni mum of 30 days under nor mal weat her condi t i ons.

1. 9. 4 Sealants

Do not appl y wat er r epel l ent s unt i l t he seal ant s f or j oi nt s adj acent t o sur f aces r ecei v i ng wat er r epel l ent t r eat ment have been i nst al l ed and cur ed.

a. Wat er r epel l ent wor k may pr ecede seal ant appl i cat i on onl y i f seal ant adhesi on and compat i bi l i t y have been t est ed and ver i f i ed usi ng subst r at e, wat er r epel l ent , and seal ant mat er i al s i dent i cal t o t hose used i n t he wor k.

b. Pr ovi de manuf act ur er s ' t est r esul t s of compat i bi l i t y .

1. 10 INSPECTIONS

Not i f y t he manuf act ur er ' s r epr esent at i ve a mi ni mum of 72 hour s pr i or t o schedul ed appl i cat i on of wat er r epel l ent s f or f i el d i nspect i on. I nspect sur f aces and obt ai n appr oval i n wr i t i ng f r om t he manuf act ur er ' s r epr esent at i ve pr i or t o any appl i cat i on of any wat er r epel l ent coat i ng.

1. 11 SURFACES TO BE COATED

Coat al l ext er i or sur f aces. Thi s i ncl udes back f aces of par apet s, t op of wal l s, edges and r et ur ns adj acent t o wi ndows and door f r ames and f r ee st andi ng wal l s.

1. 12 WARRANTY

Pr ovi de a war r ant y, i ssued j oi nt l y by t he manuf act ur er and t he appl i cat or of t he wat er r epel l ent t r eat ment agai nst moi st ur e penet r at i on t hr ough t he t r eat ed st r uct ur al l y sound sur f ace f or a per i od of f i ve year s. War r ant y t o pr ovi de t he mat er i al , l abor , and equi pment necessar y t o r emedy t he pr obl em. At t he sat i sf act or y compl et i on of t he wor k, compl et e t he

Apr i l 2019 Page 5 SECTI ON 07 19 00 war r ant y s i gn, not ar i ze, and submi t t o t he Cont r act i ng Of f i cer .

PART 2 PRODUCTS

2. 1 MATERIALS

Wat er r epel l ent sol ut i on shal l be a c l ear , non- yel l owi ng, deep- penet r at i ng, VOC compl i ant sol ut i on. Mat er i al shal l not st ai n or di scol or and shal l pr oduce a mechani cal and chemi cal i nt er l ocki ng bond wi t h t he subst r at e t o t he dept h of t he penet r at i on.

2. 2 WATER REPELLENTS

2. 2. 1 Si l ane, 20 Per cent Sol i ds

Penet r at i ng wat er r epel l ent . A monomer i c compound cont ai ni ng appr oxi mat el y 20 per cent al kyl t r i al koxysi l anes wi t h al cohol , mi ner al spi r i t s, wat er , and ot her pr opr i et ar y sol vent car r i er .

a. Composi t i on: Modi f i ed al kyl al koxysi l ane.

b. Act i ve al kyl al koxysi l ane cont ent : ASTM D2369 20 per cent by wei ght , pl us or mi nus 1 per cent .

c. Appear ance: Whi t e, mi l ky l i qui d.

d. Aver age dept h of penet r at i on: Up t o 3/ 8 i nchdependi ng on subst r at e.

e. VOC cont ent : Less t han 350 gr ams per l i t er .

f . Fl ash poi nt , ASTM D3278.

g. Speci f i c gr avi t y, at 78 degr ees F: 0. 96 t o 0. 98.

h. Densi t y: . 0 t o 8. 2 pounds per gal l on.

2. 2. 2 Si l ane, 40 Per cent Sol i ds

Penet r at i ng wat er r epel l ent . A monomer i c compound cont ai ni ng appr oxi mat el y 40 per cent al kyl t r i al koxysi l anes wi t h al cohol , mi ner al spi r i t s, or wat er .

a. Composi t i on: Modi f i ed al kyl al koxysi l ane.

b. Act i ve al kyl al koxysi l ane cont ent : ASTM D2369 40 per cent by wei ght , pl us or mi nus 1. 5 per cent .

c. Appear ance: Whi t e, mi l ky l i qui d.

d. Aver age dept h of penet r at i on: Up t o 3/ 8 i nch dependi ng on subst r at e.

e. VOC cont ent : Less t han 350 gr ams per l i t er .

f . Fl ash poi nt , ASTM D3278.

g. Speci f i c gr avi t y, at 78 degr ees F: 0. 94 t o 0. 97.

h. Densi t y: 7. 8 t o 8. 1 pounds per gal l on.

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2. 2. 3 Si l ane, 85 Per cent Sol i ds or Gr eat er

Penet r at i ng wat er r epel l ent . A monomer i c compound cont ai ni ng 85 per cent or gr eat er al kyl t r i al koxysi l anes wi t h al cohol , mi ner al spi r i t s, or wat er .

a. Composi t i on: Modi f i ed al kyl al koxysi l ane.

b. Act i ve al kyl al koxysi l ane cont ent : ASTM D2369 20 per cent by wei ght , pl us or mi nus 1 per cent .

c. Appear ance: Whi t e, mi l ky l i qui d.

d. Aver age dept h of penet r at i on: Up t o 3/ 8 i nch dependi ng on subst r at e.

e. VOC cont ent : Less t han 350 gr ams per l i t er .

f . Fl ash poi nt , ASTM D3278.

g. Speci f i c gr avi t y, at 78 degr ees F: 0. 96 t o 0. 98.

h. Densi t y: 8. 0 t o 8. 2 pounds per gal l on.

2. 2. 4 Siloxanes

Penet r at i ng wat er r epel l ent . Al kyl al koxysi l oxanes t hat ar e ol i gomer ous wi t h al cohol , et hanol , mi ner al spi r i t s, or wat er .

a. Sol i ds by wei ght : ASTM D2369, 7. 5 t o 16. 0 per cent .

b. Vol at i l e Or gani c Cont ent ( VOC) af t er bl endi ng: Less t han 175 gr ams per l i t er .

c. Densi t y, act i vat ed: 8. 4 pounds per gal l on, pl us or mi nus one per cent .

d. Fl ash poi nt , ASTM D3278: Gr eat er t han 212 degr ees F.

2. 2. 5 Low- Sol i ds Acr yl i c

Wat er - c l ear , br eat hi ng coat i ng of acr yl i c r esi ns, wat er - based, sol vent - based, or acr yl i c emul si ons sol ut i on cont ai ni ng l ess t han 15 per cent sol i ds by vol ume.

2. 2. 6 Hi gh- Sol i ds Acr yl i c

Wat er - c l ear , br eat hi ng coat i ng of acr yl i c r esi ns, wat er - based, sol vent - based, or acr yl i c emul si ons sol ut i on cont ai ni ng 15 per cent sol i ds or mor e by vol ume.

2. 2. 7 VOC- Compl yi ng Wat er Repel l ent s

Pr oduct s cer t i f i ed by t he manuf act ur er t hat t hey compl y wi t h l ocal r egul at i ons cont r ol l i ng use of vol at i l e or gani c compounds ( VOC' s) .

2. 3 PERFORMANCE CRI TERI A

2. 3. 1 Si l ane, 20 Per cent Sol i ds

a. Wat er absor pt i on t est : ASTM C642 and ASTM E514/ E514M.

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b. Moi st ur e vapor t r ansmi ssi on: ASTM D1653, 28. 33 per ms or 51. 61 per cent maxi mum compar ed t o unt r eat ed sur f aces.

c. Scal i ng r esi st ance: ASTM C672/ C672M, non- ai r - ent r ai ned concr et e, zer o r at i ng, no scal i ng, 100 cycl es t r eat ed concr et e.

d. Resi st ance t o chl or i de i on penet r at i on: AASHTO T 259 and AASHTO T 260.

e. Wat er penet r at i on and l eakage t hr ough masonr y, ASTM E514/ E514M per cent age r educt i on of l eakage: 97 per cent mi ni mum.

f . Resi st ance t o accel er at ed weat her i ng, ASTM G154 t est i ng 2, 500 hour s:

No l oss i n r epel l ency.

g. Dr yi ng t i me under nor mal condi t i ons: Four hour s per 75 degr ees F.

2. 3. 2 Si l ane, 40 Per cent Sol i ds

a. Aver age dept h of penet r at i on: 3/ 8 i nches dependi ng on subst r at e

b. Resi st ance t o chl or i de i on penet r at i on, AASHTO T 259 and AASHTO T 260.

c. Wat er absor pt i on t est , ASTM E514/ E514M: 0. 42 per cent per 48 hour s;

1. 2 per cent per 50 days.

d. Moi st ur e vapor t r ansmi ssi on: ASTM D1653, 28. 33 per ms or 51. 61 per cent maxi mum compar ed t o unt r eat ed sur f aces.

e. Scal i ng r esi st ance, ASTM C672/ C672M, non- ai r - ent r ai ned concr et e: Zer o r at i ng, no scal i ng, 100 cycl es t r eat ed concr et e.

f . Resi st ance t o accel er at ed weat her i ng, ASTM G154. Test i ng 2, 500 hour s: No l oss i n r epel l ency.

g. Dr yi ng t i me under nor mal condi t i ons: Four hour s per 75 degr ees F.

2. 3. 3 Si l ane, 85 Per cent Sol i ds or Gr eat er

a. Aver age dept h of penet r at i on: 3/ 8 i nches dependi ng on subst r at e.

b. Resi st ance t o chl or i de i on penet r at i on, AASHTO T 259 and AASHTO T 260.

c. Wat er absor pt i on t est , ASTM E514/ E514M: 0. 42 per cent per 48 hour s;

1. 2 per cent per 50 days.

d. Moi st ur e vapor t r ansmi ssi on: ASTM D1653, 28. 33 per ms or 51. 61 per cent maxi mum compar ed t o unt r eat ed sur f aces.

e. Scal i ng r esi st ance, ASTM C672/ C672M, non- ai r - ent r ai ned concr et e: Zer o r at i ng, no scal i ng, 100 cycl es t r eat ed concr et e.

f . Resi st ance t o accel er at ed weat her i ng, ASTM G154. Test i ng 2, 500 hour s: No l oss i n r epel l ency.

g. Dr yi ng t i me under nor mal condi t i ons: Four hour s per 75 degr ees F.

2. 3. 4 Siloxanes

a. Dr y t i me f or r ecoat , i f necessar y: One t o t wo hour s dependi ng on

Apr i l 2019 Page 8 SECTI ON 07 19 00 weat her condi t i ons.

b. Penet r at i on: 3/ 8 i nch, dependi ng on subst r at e.

c. Wat er penet r at i on and l eakage t hr ough masonr y, ASTM E514/ E514M, per cent age r educt i on of l eakage: 97. 0 per cent mi ni mum.

d. Moi st ur e vapor t r ansmi ssi on, ASTM E96/ E96M: 47. 5 per ms or 82 per cent maxi mum compar ed t o unt r eat ed sampl e.

e. Resi st ance t o accel er at ed weat her i ng, ASTM G154. Test i ng 2, 500 hour s: No l oss i n r epel l ency.

f . Resi st ance t o chl or i de i on penet r at i on, AASHTO T 259 and AASHTO T 260.

g. Scal i ng r esi st ance, ASTM C672/ C672M, non- ai r - ent r ai ned concr et e: Zer o r at i ng, no scal i ng, 100 cycl es t r eat ed concr et e.

PART 3 EXECUTI ON

3. 1 EXAMINATION

Exami ne concr et e, , or masonr y sur f aces t o be t r eat ed t o ensur e t hat :

a. Al l v i s i bl e cr acks, voi ds or hol es have been r epai r ed.

b. Al l mor t ar j oi nt s i n masonr y ar e t i ght and sound, have not been r e- set or mi sal i gned and show no cr acks or spal l i ng.

c. Moi st ur e cont ent s of wal l s does not exceed 15 per cent when measur ed on an el ect r oni c moi st ur e r egi st er , cal i br at ed f or t he appr opr i at e substrate.

d. Concr et e sur f aces ar e f r ee of f or m r el ease agent s, cur i ng compounds and ot her compounds t hat woul d pr event f ul l penet r at i on of t he wat er r epel l ent mat er i al .

Do not st ar t wat er r epel l ent t r eat ment wor k unt i l al l def i c i enci es have been cor r ect ed, exami ned and f ound accept abl e t o t he Cont r act i ng Of f i cer and t he wat er r epel l ent t r eat ment manuf act ur er . Do not appl y t r eat ment t o damp, di r t y, dust y or ot her wi se unsui t abl e sur f aces. Compl y wi t h t he manuf act ur er ' s r ecommendat i ons f or sui t abi l i t y of sur f ace.

3. 2 PREPARATION

3. 2. 1 Sur f ace Pr epar at i on

Pr epar e subst r at es i n accor dance wi t h wat er r epel l ent t r eat ment manuf act ur er ' s r ecommendat i on. Cl ean sur f aces of dust , di r t , ef f l or escence, al kal i ne, and f or ei gn mat t er det r i ment al t o pr oper appl i cat i on of wat er r epel l ent t r eat ment .

3. 2. 2 Protection

Pr ovi de maski ng or pr ot ect i ve cover i ng f or mat er i al s whi ch coul d be damaged by wat er r epel l ent t r eat ment .

a. Pr ot ect gl ass, gl azed pr oduct s, and pr ef i ni shed pr oduct s f r om cont act wi t h wat er r epel l ent t r eat ment .

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b. Pr ot ect l andscape mat er i al s wi t h br eat hi ng t ype dr op cl ot hs: pl ast i c cover s ar e not accept abl e.

3. 2. 3 Compatibility

a. Conf i r m t r eat ment compat i bi l i t y wi t h each t ype of j oi nt seal er wi t hi n or adj acent t o sur f aces r ecei v i ng wat er r epel l ent t r eat ment i n accor dance wi t h manuf act ur er ' s r ecommendat i ons.

3. 3 MIXING

Mi x wat er r epel l ent mat er i al t hor oughl y i n accor dance wi t h t he manuf act ur er ' s r ecommendat i ons. Mi x, i n quant i t i es r equi r ed f or t hat days wor k, al l cont ai ner s pr i or t o appl i cat i on. Mi x each cont ai ner t he same l engt h of t i me.

3. 4 APPLICATION

I n st r i ct accor dance wi t h t he manuf act ur er s wr i t t en r equi r ement s. Do not st ar t appl i cat i on wi t hout t he manuf act ur er ' s r epr esent at i ve bei ng pr esent or hi s wr i t t en accept ance of t he sur f ace t o be t r eat ed.

3. 4. 1 Wat er Repel l ent Tr eat ment

3. 4. 1. 1 Spr ay Appl i cat i on

Spr ay appl y wat er r epel l ent mat er i al t o ext er i or concr et e, and masonr y sur f aces usi ng l ow- pr essur e ai r l ess spr ay equi pment i n st r i ct accor dance wi t h manuf act ur er ' s pr i nt ed appl i cat i on, i nst r uct i ons, and pr ecaut i ons.

Mai nt ai n copi es at t he j ob s i t e. Appl y f l ood coat i n an over l appi ng pat t er n al l owi ng appr oxi mat el y 8 t o 10 i nch r undown on t he ver t i cal sur f ace. Mai nt ai n a wet edge at al l over l aps, bot h ver t i cal and hor i zont al . Hol d gun maxi mum 18 i nches f r om wal l .

3. 4. 1. 2 Br ush or Rol l er Appl i cat i on

Br ush or r ol l er appl y wat er r epel l ent mat er i al onl y at l ocat i ons wher e over spr ay woul d af f ect adj acent mat er i al s and wher e not pr act i cal f or spr ay appl i cat i ons.

3. 4. 1. 3 Cover ed Sur f aces

Coat al l ext er i or concr et e, or masonr y sur f aces i ncl udi ng back f aces of par apet s, t ops of wal l s, edges and r et ur ns adj acent t o wi ndow and door f r ames, wi ndow si l l s , and f r ee- st andi ng wal l s.

3. 4. 1. 4 Rat e of Appl i cat i on

Appl y mat er i al s t o ext er i or sur f aces at t he cover ages r ecommended by t he manuf act ur er and as det er mi ned f r om sampl e panel t est . I ncr ease or decr ease appl i cat i on r at es dependi ng upon t he sur f ace t ext ur e and por osi t y of t he subst r at e so as t o achi eve even appear ance and t ot al wat er repellency.

3. 4. 1. 5 Number of Coat s

The sampl e panel t est shal l det er mi ne t he number of coat s r equi r ed t o

Apr i l 2019 Page 10 SECTI ON 07 19 00 achi eve f ul l cover age and pr ot ect i on.

3. 4. 1. 6 Appearance

I f unevenness i n appear ance, l i nes of wor k t er mi nat i on or scaf f ol d l i nes exi st , or det ect abl e changes f r om t he appr oved sampl e panel occur , t he Cont r act i ng Of f i cer may r equi r e addi t i onal t r eat ment at no addi t i onal cost t o t he Gover nment . Appl y any r equi r ed addi t i onal t r eat ment t o a nat ur al br eak of f poi nt .

3. 5 CLEANING

Cl ean al l r uns, dr i ps, and over spr ay f r om adj acent sur f aces whi l e t he wat er r epel l ent t r eat ment i s st i l l wet i n a manner r ecommended by t he manufacturer.

3. 6 FI ELD QUALI TY CONTROL

Do not r emove dr ums cont ai ni ng wat er r epel l ent mat er i al f r om t he j ob s i t e unt i l compl et i on of al l wat er r epel l ent t r eat ment and unt i l so aut hor i zed by t he Cont r act i ng Of f i cer .

3. 6. 1 Fi el d Test i ng

AAMA 501. 1. At a t i me not l ess t han t went y days af t er compl et i on of t he wat er r epel l ent coat i ng appl i cat i on, subj ect a r epr esent at i ve wal l ar ea of t he bui l di ng t o t he Navy Hose St r eam Fi el d Test s i mi l ar t o AAMA 501. 1 hose t est t o s i mul at ed r ai nf al l f or a per i od of t hr ee hour s. Use a mi ni mum 5/ 8 i nch di amet er hose and a f i xed l awn spr i nkl er spr ay head whi ch wi l l di r ect a f ul l f l ow of wat er agai nst t he wal l . Pl ace t he spr i nkl er head so t hat t he wat er wi l l s t r i ke t he wal l downwar d at a 45 degr ee angl e t o t he wal l .

I f t he i nsi de of t he wal l shows any t r ace of moi st ur e dur i ng or f ol l owi ng t he t est , appl y anot her coat of wat er r epel l ent , at t he manuf act ur er ' s r ecommended cover age r at e t o t he ent i r e bui l di ng. Repeat t est i ng and r e- coat i ng pr ocess unt i l no moi st ur e shows on t he i nsi de wal l f ace.

Accompl i sh any r equi r ed wor k r et est i ng and r e- coat i ng at no addi t i onal cost t o t he Gover nment .

3. 6. 2 Si t e I nspect i on

I nspect t r eat ment i n pr ogr ess by manuf act ur er ' s r epr esent at i ve t o ver i f y compl i ance wi t h manuf act ur er i nst r uct i ons and r ecommendat i ons.

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