105/207 as per their data sheet:
Physical Properties of Cured Epoxy
Specific gravity ...........................................................................................1.15
Hardness (Shore D) ASTM D-2240 ..............................................................84.4
Compression yield ASTM D-695 .........................................................11,000 psi
Tensile strength ASTM D638 ...............................................................6,750 psi
Tensile elongation ASTM D-638................................................................. 3.8%
Tensile modulus ASTM D-638............................................................. 4.40E+05
Flexural strength ASTM D-790 ...........................................................11,300 psi
Flexural modulus ASTM D-790 .......................................................... 4.12E+05
105/207 Epoxy is used for coating and fiberglass cloth application where an exceptionally clear, moisture-resistant, natural wood finish is desired. 105/207 is blush free and will not turn cloudy in humid conditions. Thin film applications roll out and tip off smoothly, requiring less sanding in preparation for finish coatings.
Three coats or more can be applied in one day without additional surface preparation. Fewer coats are required to fill fiberglass weave and in most cases the final coating can be sanded the following day.
105/207 forms a high-strength, moisture-resistant solid with excellent bonding and barrier coating properties and is used as a structural adhesive for gluing and laminating.
It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 helps provide a beautiful, long lasting finish when used with quality UV-filtering varnish. It is formulated without volatile solvents resulting in a very low VOC content. It has a relatively high flash point, no strong solvent odor and does not shrink after curing.
105/205 specs:
Physical Properties of Cured Epoxy
Specificgravity ......................................................................................................1.18
Hardness (Shore D) ASTM D-2240 .......................................................................... 83
Compression yield ASTM D-695 ................................................................ 11,400 psi
Tensile strength ASTM D638 ........................................................................7,900 psi
Tensile elongation ASTM D-638 ..........................................................................3.4%
Tensile modulus ASTM D-638 .....................................................................4.08E+05
Flexural strength ASTM D-790 .................................................................. 14,100 psi
Flexural modulus ASTM D-790 ...................................................................4.61E+05
105/205 Epoxy is used for general coating and bonding applications at lower temperatures and to produce a rapid cure that develops its physical properties quickly at room temperature.
105/205 forms a high-strength, moisture-resistant solid with excel lent bonding and barrier coating properties. It will wet out and bond to wood fiber, fiberglass, reinforcing fabrics, foam and other composite materials, and a variety of metals.
105/205 Epoxy can be thickened with WEST SYSTEM fillers to bridge gaps and fill voids and can be sanded and shaped when cured. With roller applications, it has excellent thin- film characteristics, allowing it to flow out and self-level without “fish-eyeing.” Multiple coats of 105/205 Epoxy create a superior moisture barrier and a tough, stable base for paints and varnishes. It is formulated without volatile solvents resulting in a very low VOC content. It has a relatively high flash point, no strong solvent odor and does not shrink after curing. It is not intended for clear coating natural finished wood
Pick the right material for the application. Speed doesn't necessarily answer the question of strength.