PRIMERS:   

-  60 Masonry - P-70 Metal -  58 Masonry - P-69 Metal
-  Meets C.G.S.B. Specifications 19-GP-7 for two part elastomeric Sealants and 19-GP-10 for one part elastomeric Sealants

DESCRIPTION

THIOPLAST PRIMERS were especially developed to provide the maximum in bonding strength for Thioplast when subjected to extremely wet conditions or excessive joint movement.  They should be applied to clean dry surfaces.  Do not contaminate primer by allowing it to come into contact with asphalt or tar impregnated fillers.  Care should be taken so that primers are applied within the confines of the joint.  Protect exposed surfaces with masking tape to prevent primer staining.  If primer is accidently splashed on adjacent areas, remove immediately by flooding area with Toluol or Xylene and wipe with clean cloth.

C-60 MASONRY PRIMER:   This is a light straw coloured primer recommended for priming concrete, masonry, wood, fibreglass, asbestos cement and marble joints prior to sealing with Thioplast.  C-60 Primer will help prevent deterioration of porous surfaces, by sealing, levelling, and binding the surface to insure maximum adhesion of the sealant.  C-60 dries in 2 to 4 hours which allows caulking or sealing operation to proceed without appreciable delay.

P-70 METAL PRIMER:   This is a light coloured, highly specialized primer recommended for priming aluminum, steel or glass where moisture or extreme joint movement is anticipated.

COVERAGE

Usually 1/2 to 3/4 pint of primer is sufficient for a 3/4 gallon unit of Thioplast (approximately 1 to 10 ratio by volume).

GENERAL RECOMMENDATIONS

Priming may or may not be necessary depending upon:

1)  the type of surface involved
2)  movement anticipated
3)  when unusual demands are placed upon the sealant

Joints subjected to excessive movement should be primed to obtain every advantage of bonding strength.  Unusual demands may be considered as constant water immersion, extreme temperature variations, unusual design or some special service requirement.

SURFACE PREPARATION

All primed surfaces should be protected from dust and moisture prior to sealant application; as this can cause a serious permanent loss of adhesion in the primer film.

GLASS:   Clean with Xylene, Toluol or other suitable oil free cleaning solvents.  Glass does not normally require priming.

PORCELAIN ENAMEL:   New porcelain enamel surfaces only require to be clean and dry.  Remove surface haze on weathered porcelain enamel by wire brush, sand paper or phosphoric acid etch.

METAL:   Remove surface coatings or corrosion by sandblasting, grinding, wire brushing or solvents.  For better adhesion, leave surface in roughened condition when wire brush or grinds are used.  When solvents or chemical corrosion removers are used, allow solvent to dry thoroughly and remove traces of chemical corrosion remover from surfaces.

ALUMINUM:   Remove protective lacquer coating on new aluminum surfaces with Toluol or Xylene.  Corrosion on weathered aluminum surfaces should be removed with steel wool, buffing wheel or soft wire brush.  Clean surfaces with Toluol.  Except where very wet conditions prevail or unusual joint movement is anticipated, priming is unnecessary.

STEEL:   Clean corrosion and coatings by sandblasting or with hand or power driven brush.  Clean surfaces with Toluol.  Except where very wet conditions prevail or unusual joint movement is anticipated, priming is unnecessary.

MASONRY:   Sandblast or chip to remove all traces of mold release agents, curing agents, alkaline salts, or oil base caulks.  To remove friable material or loose particles, wire brush or chip and blow out joints with oil-free air.  Apply at least one coat of C-60 primer and allow to dry thoroughly.

CONCRETE:   Concrete must be fully cured (at least 28 days) and dry.  Remove soluble alkaline salts by washing.  Remove excess alkalinity by etching with 5% solution of nuriatic acid, rinsed thoroughly with clear water and dry.  Remove coatings and mold release agents.  Remove all traces of oil base caulks or masstics, sandblast or power grind surfaces that have absorbed oil, to insure clean surfaces.  Prime concrete with C-60 primer.

WOOD:   Sand or cut-back surface to expose clean, solid wood.  Apply one coat of C-60 primer and allow to dry thoroughly.

PRECAUTIONS

1)  Primers are flammable and toxic
2)  Keep away from heat, sparks and open flame
3)  Avoid prolonged breathing of vapours or repeated skin contact
4)  Keep containers closed when not in actual use
5)  Store at 60^o F to 72^o F for maximum storage life

-  higher temperatures reduce storage life
-  lower temperatures increases viscosity temporarily

6)  Shelf life 4 to 6 months