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Unread 04-06-2006, 07:24 PM   #7
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Join Date: Nov 2003
Location: LaConner, Washington
Posts: 13,694

Here is an excellent "How-to" primer on SpectaLOCK PRO grout written by Ron Nash, Technical Representative for Laticrete International:


Let me give you some tips.

edit: Links dead. All info is available on Laticrete's site.

I can't say it better than our how to sheet: Directly quoted:

Before you Begin:
■ Follow adhesive manufacturer’s recommendations for minimum cure time prior to grouting.
■ LATICRETE® SpectraLOCK PRO™ Grout is a sanded grout. Use of sanded grouts in joints less than 1/8” (3mm) will result in a coarser surface texture as compared to wider joints.
■ Do not add water or any other materials to the grout mixture. Do not re-temper with water. This will have an adverse effect on the product and void all warranties.
Clean-up is critical. Prepare for the initial and final washes by having 2 pails of clean water ready for the clean up process.

Preparation and Installation Tools:
■ Broom/vacuum (remove debris)
■ Utility Knife (removes excess thin-set in joints, open A & B pouches)
■ Clean water and sponges (to clean surface of tile)
■ Firm edged, rubber epoxy grout float
■ Margin trowel
■ Low speed drill and grout mix paddle (optional - you can hand mix)
■ Empty pails

Clean-up Supplies:
■ Fresh water supply
■ Extra Sponges (for floor installation -we give you 1 per full unit.)
■ Terry cloth towels (optional for wall clean up)
■ Empty pails

Surface Preparation:
■ Ensure the tile surface has no residual film from adhesive setting material.
■ FOR YOUR TRAVERTINE: The use of a topical sealer or grout release applied to unglazed porcelain tile, abrasive, non-slip or rough textured tiles or porous tile or stone surfaces before grouting will facilitate cleaning. *SAME ADVISE FOR REGULAR GROUT.*
■ LATICRETE SpectraLOCK PRO Grout, as well as other sanded grouts, may “scratch” glass tiles, soft or polished marble and stone, soft glazed and handmade tiles. Test grout on a small area to ensure compatibility.
■ Test stone for compatibility with water and cleaning additive mixture.
■ Epoxy resins may affect the color of porous stone. Verify results with a test area. Hence the sealer..
■ Make sure tile surface and open grout joints are clean, and free from debris, grout spacers or standing water.
■ Surface temperature range for installation must be above 40°F and less than 95°F.

Working Time:
Working time of grout is approximately 80 minutes at 70°F after the components are thoroughly mixed. Please note that working time is affected by many variables including grout mix consistency, surface and room
temperatures. Warmer climates, for example, will shorten working time, while colder conditions will extend working time.

■ Cut open Part A and B pouches, and our the liquids (A first, then B) into a
clean pail. Make sure to squeeze all the liquids out of the pouches.
NOTE: Fold in half and roll up like a toothpaste tube.
■ Mix liquids thoroughly, completely blending all liquid from sides and bottom of pail. Mix with a margin trowel or slow speed drill mixer (< 300 RPM).
■ Once blended, add Part C Color powder to blended A and B liquids and mix thoroughly with margin trowel or slow speed drill mixer (< 300 RPM). The LATICRETE SpectraLOCK PRO Grout unit is designed to use all the Part C Color powder for most applications. For narrow joints, it is acceptable to leave out up to 10% Part C color powder to produce a more fluid mix.

■ After surfaces are cleaned, allow to dry thoroughly before grouting.
■ Spread grout using a sharp edged, firm epoxy rubber float. Work the
grout diagonally across the joints,packing them full.
■ “Cut” excess grout off the tile surface using the edge of the float held at a 90° angle like a squeegee, stroking diagonally to avoid pulling grout out of filled joints.

Initial Wash:
NOTE: Have cleaning water, new clean sponge and initial wash cleaning additive packet ready.
■ Once grout has been spread, wait 20–30 minutes before cleaning (or within one hour of initial mixing of product).
Wait longer at colder temperatures.
Add initial wash cleaning additive to two gallons of clean water and mix until fully dissolved.
Submerge clean sponge into water and wring until damp.
**If you have a dripping sponge it's too wet.**
Change water with cleaning additive mixture every 50 ft2 when using multiple units.
■ Wipe grout joints and tile surface in a light circular motion, loosening grout
residue while making the joints smooth.
■ Drag a clean sponge diagonally over the scrubbed surfaces to remove grout residue. Rinse sponge after every pass; use each side of sponge only once between rinsing. Discard sponges when they become “gummy” with residue. Check work as you clean. Repair any low spots with additional grout.

Wall Applications:
■ If grout bleeds or sags out of joint, stop immediately and wait an additional 15 minutes for grout to firm up before washing. Or you may add more Part C Color powder if you held some back.
■ Instead of a sponge, the use of a damp, well wrung, folded terry cloth towel can be helpful to remove excess grout while smoothing joints less than 1/8” on walls. Use light pressure when using folded terry cloth towel.
■ Certain tiles clean up more easily than others, so be sure to rinse sponge frequently, checking your work as you progress.

Final Inspection & Cleaning:

■ Begin final cleaning approximately one hour after initial wash has taken place. Prepare another 2 gallons of clean water and pour in the final wash cleaning additive packet, mix fully.
■ Follow the same process as the initial wash but use the clean white scrub pad in place of the sponge to break apart any leftover
residue. Rinse scrub pad frequently.
■ Then, drag a clean sponge diagonally over the scrubbed surfaces to remove froth and residue. Use each side of sponge only once before rinsing and change water and cleaning additive mixture at least every 50 ft2 when using multiple units.
■ Allow cleaned areas to dry and inspect tile/stone surface. For persistent grout film/haze (within 24 hours), scrub area with mixture of two gallons clean water and 4 oz. white vinegar. Conduct a test area to verify results on polished stones.
■ Rinse with clean water and allow surface to dry.
Inspect grout surface and repair as required with freshly mixed grout.

I'm sorry for the long post, but you never know who might have this question, so I've got to do it right.

You'll notice that other than the mixing procedures it installs very similarly to regular grout.

You prep, you mix, you let it firm up (Haze), you dress the joint, you wash, you final wash. Only you NEVER have to seal.

Email or call me if you need more help in the field:
Ron Nash
Laticrete International
(203) 671-0057 Cell

Last edited by Tiger Mountain Tile Inc; 11-28-2016 at 12:11 PM.
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