Both of Techspray's metal 5-gallon and 55-gallon drums are compatible with standard 3/4" and 2" spouts. Ideally use 3/4" for 5-gallon, 2" for 55-gallon. These can be purchased from Lab Safety (www.labsafety.com):
1A-13572 - 3/4"
1A-11329 - 2"

For aerosol (1756-8S), 2 light coats will cover ~ 2.5 sq meters (27 sq ft)/can. One light coat will give you about twice that. For bulk (1756-G), a 1-mil wet coat will yield ~ 972 sq ft/gallon. Note that a 1-mil wet coat ends up at ~ 0.1 mil thick cured coat.

It may be different state-by-state, so contact your state environmental agency for regional specific regulations. For a general guideline, here is the process according to EPA hazardous waste regulations 40CFR. The can has to be brought to or approach atmospheric pressure to render the can empty. Puncturing is not required, only that it “approach atmospheric pressure”, i.e. empty the can contents until it’s no longer pressurized. This insures that as much contents as is reasonably possible are out of the can. It is then considered “RCRA-empty”. At that point it can be handled as any other waste metal container, generally as scrap metal under the recycling rules. Note that the can is still considered a solid waste at this point (not necessarily hazardous waste).

From -55° C to 150° C.

MIL-C 81302 is a specific requirement for Freon-based cleaners (trichloro-trifluoroethane), so in effect is an outdated spec except where use is allowed. It does not apply to any current Techspray products.

MIL-PRF-29608 is a more current spec for solvent performance requirements. "Cleaning and Cleaning-lubricating compounds, Electrical Contact, Low Ozone Depletion Potential" is the name of the spec.

The following G3 cleaners are Type II, Class C under MIL-PRF-29608:
- G3 Blue Shower (1630-16S)
- G3 Flux Remover (1631-16S)
- G3 No-Clean Flux Remover (1634-16S)
- G3 Contact Cleaner (1632-16S)
- G3 Universal Cleaner (1638-G)
- Precision-V Cleaner (1651-16S and 1651-G)

The “type” is referred to in the older version. It is no longer used in the newer version. Both are performance specifications. The above products meet these requirements.

No, it should not be a concern. Many of Techspray's non-flammable solvents (e.g. G3, Precision-V) contain 1,2-trans-dichloroethylene (Trans, CAS# 156-60-5), which has caused confusion. The regulations controlling chlorinated solvents do not generally pertain to Trans. The following are the reasons:

1. Many are confused with “chloro” substances due to the NESHAP requirements. The big 3 chlorinated substances are Perchloroethylene (Perc), Trichloroethylene (TCE), and methylene chloride. The association of those with all chlorinated substances is not valid.

2. NESHAP requirements only refer to restrictions of emissions of hazardous air pollutants (HAP). Of the nearly 200 substances listed as HAP’s, Trans is not on that list. Reference the following link: http://scorecard.goodguide.com/chemical-groups/one-list.tcl?short_list_name=hap.

3. Trans has the same exposure limit (per ACGIH) time-weighted average (TWA) as 2-propanol (IPA) -- 200 ppm. In contrast, n-Propyl Bromide (nPB) is commonly used in vapor degreasers, with TWA established by ACGIH of 10 ppm. It has been proposed to be reduced to 0.1 ppm. nPB is also listed on various carcinogen lists, notably Prop 65.

Techspray's G3 Maintenance Cleaner (1630) and G3 Contact Cleaner (1632) have been tested and certified under certified per Boeing specification D6-17487 Revision P.

Wet film thickness	Sq. ft. per gal.
0.1 mil	16,040
0.5 mil	3,210
1 mil	1,600
2 mil	802
3 mil	535
4 mil	401
5 mil	321
6 mil	267
7 mil	229
8 mil	201
9 mil	178
10 mil	160

We offer “thinner” viscosity ranges as custom blends. However, each of the 3 types of coatings in bulk may be thinned with 2105.

In almost all cases, the cloudy or milky cure comes from coating in higher humidity conditions. The white foam (from an aerosol) is caused the same way. We have the following suggestions:

1. If possible, allow the substrate and coating material to come to approximately the same temperature when applying.

2. Avoid applications in RH > 60%. High humidity ranges will discolor some coating resins and will start curing others. Besides the aesthetic value, it certainly may affect adhesion to the material.

3. Specifically on the silicone coating, if the resulting application is foamy, increase the focal point of the can, ie back off to about 10 -12” from the substrate & make 2 -3 light passes rather than one heavy pass to coat the board.